cefff2ca25
Upstream EXWM is now sort-of unmaintained[0], but some important PRs are pending[1] which I would like to absorb here somehow. [0]: https://github.com/ch11ng/exwm/issues/845 [1]: https://github.com/ch11ng/exwm/pull/848 git-subtree-dir: third_party/exwm git-subtree-mainline:7894d7e178git-subtree-split:0368127976Change-Id: I078358c0ea1d2bac99111748ce9c137d2804ac4e
587 lines
25 KiB
EmacsLisp
587 lines
25 KiB
EmacsLisp
;;; exwm-systemtray.el --- System Tray Module for -*- lexical-binding: t -*-
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;;; EXWM
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;; Copyright (C) 2016-2020 Free Software Foundation, Inc.
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;; Author: Chris Feng <chris.w.feng@gmail.com>
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; This module adds system tray support for EXWM.
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;; To use this module, load and enable it as follows:
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;; (require 'exwm-systemtray)
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;; (exwm-systemtray-enable)
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;;; Code:
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(require 'xcb-icccm)
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(require 'xcb-xembed)
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(require 'xcb-systemtray)
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(require 'exwm-core)
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(require 'exwm-workspace)
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(defclass exwm-systemtray--icon ()
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((width :initarg :width)
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(height :initarg :height)
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(visible :initarg :visible))
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:documentation "Attributes of a system tray icon.")
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(defclass xcb:systemtray:-ClientMessage
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(xcb:icccm:--ClientMessage xcb:ClientMessage)
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((format :initform 32)
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(type :initform xcb:Atom:MANAGER)
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(time :initarg :time :type xcb:TIMESTAMP) ;new slot
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(selection :initarg :selection :type xcb:ATOM) ;new slot
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(owner :initarg :owner :type xcb:WINDOW)) ;new slot
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:documentation "A systemtray client message.")
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(defgroup exwm-systemtray nil
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"System tray."
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:version "25.3"
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:group 'exwm)
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(defcustom exwm-systemtray-height nil
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"System tray height.
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You shall use the default value if using auto-hide minibuffer."
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:type 'integer)
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(defcustom exwm-systemtray-icon-gap 2
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"Gap between icons."
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:type 'integer)
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(defvar exwm-systemtray--embedder-window nil "The embedder window.")
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(defcustom exwm-systemtray-background-color nil
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"Background color of systemtray.
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This should be a color, or nil for transparent background."
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:type '(choice (const :tag "Transparent" nil)
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(color))
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:initialize #'custom-initialize-default
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:set (lambda (symbol value)
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(set-default symbol value)
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;; Change the background color for embedder.
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(when (and exwm--connection
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exwm-systemtray--embedder-window)
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(let ((background-pixel (exwm--color->pixel value)))
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(xcb:+request exwm--connection
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(make-instance 'xcb:ChangeWindowAttributes
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:window exwm-systemtray--embedder-window
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:value-mask (logior xcb:CW:BackPixmap
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(if background-pixel
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xcb:CW:BackPixel 0))
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:background-pixmap
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xcb:BackPixmap:ParentRelative
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:background-pixel background-pixel))
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;; Unmap & map to take effect immediately.
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(xcb:+request exwm--connection
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(make-instance 'xcb:UnmapWindow
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:window exwm-systemtray--embedder-window))
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(xcb:+request exwm--connection
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(make-instance 'xcb:MapWindow
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:window exwm-systemtray--embedder-window))
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(xcb:flush exwm--connection)))))
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;; GTK icons require at least 16 pixels to show normally.
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(defconst exwm-systemtray--icon-min-size 16 "Minimum icon size.")
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(defvar exwm-systemtray--connection nil "The X connection.")
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(defvar exwm-systemtray--list nil "The icon list.")
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(defvar exwm-systemtray--selection-owner-window nil
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"The selection owner window.")
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(defvar xcb:Atom:_NET_SYSTEM_TRAY_S0)
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(defun exwm-systemtray--embed (icon)
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"Embed an icon."
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(exwm--log "Try to embed #x%x" icon)
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(let ((info (xcb:+request-unchecked+reply exwm-systemtray--connection
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(make-instance 'xcb:xembed:get-_XEMBED_INFO
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:window icon)))
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width* height* visible)
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(when info
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(exwm--log "Embed #x%x" icon)
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(with-slots (width height)
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(xcb:+request-unchecked+reply exwm-systemtray--connection
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(make-instance 'xcb:GetGeometry :drawable icon))
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(setq height* exwm-systemtray-height
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width* (round (* width (/ (float height*) height))))
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(when (< width* exwm-systemtray--icon-min-size)
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(setq width* exwm-systemtray--icon-min-size
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height* (round (* height (/ (float width*) width)))))
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(exwm--log "Resize from %dx%d to %dx%d"
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width height width* height*))
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;; Add this icon to save-set.
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:ChangeSaveSet
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:mode xcb:SetMode:Insert
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:window icon))
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;; Reparent to the embedder.
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:ReparentWindow
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:window icon
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:parent exwm-systemtray--embedder-window
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:x 0
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;; Vertically centered.
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:y (/ (- exwm-systemtray-height height*) 2)))
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;; Resize the icon.
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:ConfigureWindow
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:window icon
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:value-mask (logior xcb:ConfigWindow:Width
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xcb:ConfigWindow:Height
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xcb:ConfigWindow:BorderWidth)
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:width width*
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:height height*
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:border-width 0))
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;; Set event mask.
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:ChangeWindowAttributes
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:window icon
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:value-mask xcb:CW:EventMask
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:event-mask (logior xcb:EventMask:ResizeRedirect
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xcb:EventMask:KeyPress
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xcb:EventMask:PropertyChange)))
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;; Grab all keys and forward them to Emacs frame.
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(unless (exwm-workspace--minibuffer-own-frame-p)
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:GrabKey
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:owner-events 0
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:grab-window icon
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:modifiers xcb:ModMask:Any
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:key xcb:Grab:Any
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:pointer-mode xcb:GrabMode:Async
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:keyboard-mode xcb:GrabMode:Async)))
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(setq visible (slot-value info 'flags))
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(if visible
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(setq visible
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(/= 0 (logand (slot-value info 'flags) xcb:xembed:MAPPED)))
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;; Default to visible.
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(setq visible t))
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(when visible
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(exwm--log "Map the window")
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:MapWindow :window icon)))
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:xembed:SendEvent
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:destination icon
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:event
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(xcb:marshal
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(make-instance 'xcb:xembed:EMBEDDED-NOTIFY
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:window icon
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:time xcb:Time:CurrentTime
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:embedder
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exwm-systemtray--embedder-window
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:version 0)
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exwm-systemtray--connection)))
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(push `(,icon . ,(make-instance 'exwm-systemtray--icon
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:width width*
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:height height*
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:visible visible))
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exwm-systemtray--list)
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(exwm-systemtray--refresh))))
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(defun exwm-systemtray--unembed (icon)
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"Unembed an icon."
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(exwm--log "Unembed #x%x" icon)
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:UnmapWindow :window icon))
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:ReparentWindow
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:window icon
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:parent exwm--root
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:x 0 :y 0))
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(setq exwm-systemtray--list
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(assq-delete-all icon exwm-systemtray--list))
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(exwm-systemtray--refresh))
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(defun exwm-systemtray--refresh ()
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"Refresh the system tray."
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(exwm--log)
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;; Make sure to redraw the embedder.
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:UnmapWindow
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:window exwm-systemtray--embedder-window))
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(let ((x exwm-systemtray-icon-gap)
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map)
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(dolist (pair exwm-systemtray--list)
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(when (slot-value (cdr pair) 'visible)
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:ConfigureWindow
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:window (car pair)
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:value-mask xcb:ConfigWindow:X
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:x x))
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(setq x (+ x (slot-value (cdr pair) 'width)
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exwm-systemtray-icon-gap))
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(setq map t)))
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(let ((workarea (elt exwm-workspace--workareas
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exwm-workspace-current-index)))
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:ConfigureWindow
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:window exwm-systemtray--embedder-window
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:value-mask (logior xcb:ConfigWindow:X
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xcb:ConfigWindow:Width)
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:x (- (aref workarea 2) x)
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:width x)))
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(when map
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:MapWindow
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:window exwm-systemtray--embedder-window))))
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(xcb:flush exwm-systemtray--connection))
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(defun exwm-systemtray--on-DestroyNotify (data _synthetic)
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"Unembed icons on DestroyNotify."
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(exwm--log)
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(let ((obj (make-instance 'xcb:DestroyNotify)))
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(xcb:unmarshal obj data)
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(with-slots (window) obj
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(when (assoc window exwm-systemtray--list)
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(exwm-systemtray--unembed window)))))
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(defun exwm-systemtray--on-ReparentNotify (data _synthetic)
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"Unembed icons on ReparentNotify."
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(exwm--log)
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(let ((obj (make-instance 'xcb:ReparentNotify)))
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(xcb:unmarshal obj data)
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(with-slots (window parent) obj
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(when (and (/= parent exwm-systemtray--embedder-window)
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(assoc window exwm-systemtray--list))
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(exwm-systemtray--unembed window)))))
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(defun exwm-systemtray--on-ResizeRequest (data _synthetic)
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"Resize the tray icon on ResizeRequest."
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(exwm--log)
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(let ((obj (make-instance 'xcb:ResizeRequest))
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attr)
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(xcb:unmarshal obj data)
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(with-slots (window width height) obj
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(when (setq attr (cdr (assoc window exwm-systemtray--list)))
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(with-slots ((width* width)
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(height* height))
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attr
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(setq height* exwm-systemtray-height
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width* (round (* width (/ (float height*) height))))
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(when (< width* exwm-systemtray--icon-min-size)
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(setq width* exwm-systemtray--icon-min-size
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height* (round (* height (/ (float width*) width)))))
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:ConfigureWindow
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:window window
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:value-mask (logior xcb:ConfigWindow:Y
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xcb:ConfigWindow:Width
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xcb:ConfigWindow:Height)
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;; Vertically centered.
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:y (/ (- exwm-systemtray-height height*) 2)
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:width width*
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:height height*)))
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(exwm-systemtray--refresh)))))
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(defun exwm-systemtray--on-PropertyNotify (data _synthetic)
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"Map/Unmap the tray icon on PropertyNotify."
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(exwm--log)
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(let ((obj (make-instance 'xcb:PropertyNotify))
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attr info visible)
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(xcb:unmarshal obj data)
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(with-slots (window atom state) obj
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(when (and (eq state xcb:Property:NewValue)
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(eq atom xcb:Atom:_XEMBED_INFO)
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(setq attr (cdr (assoc window exwm-systemtray--list))))
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(setq info (xcb:+request-unchecked+reply exwm-systemtray--connection
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(make-instance 'xcb:xembed:get-_XEMBED_INFO
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:window window)))
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(when info
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(setq visible (/= 0 (logand (slot-value info 'flags)
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xcb:xembed:MAPPED)))
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(exwm--log "#x%x visible? %s" window visible)
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(if visible
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:MapWindow :window window))
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:UnmapWindow :window window)))
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(setf (slot-value attr 'visible) visible)
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(exwm-systemtray--refresh))))))
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(defun exwm-systemtray--on-ClientMessage (data _synthetic)
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"Handle client messages."
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(let ((obj (make-instance 'xcb:ClientMessage))
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opcode data32)
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(xcb:unmarshal obj data)
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(with-slots (window type data) obj
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(when (eq type xcb:Atom:_NET_SYSTEM_TRAY_OPCODE)
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(setq data32 (slot-value data 'data32)
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opcode (elt data32 1))
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(exwm--log "opcode: %s" opcode)
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(cond ((= opcode xcb:systemtray:opcode:REQUEST-DOCK)
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(unless (assoc (elt data32 2) exwm-systemtray--list)
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(exwm-systemtray--embed (elt data32 2))))
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;; Not implemented (rarely used nowadays).
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((or (= opcode xcb:systemtray:opcode:BEGIN-MESSAGE)
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(= opcode xcb:systemtray:opcode:CANCEL-MESSAGE)))
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(t
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(exwm--log "Unknown opcode message: %s" obj)))))))
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(defun exwm-systemtray--on-KeyPress (data _synthetic)
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"Forward all KeyPress events to Emacs frame."
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(exwm--log)
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;; This function is only executed when there's no autohide minibuffer,
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;; a workspace frame has the input focus and the pointer is over a
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;; tray icon.
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(let ((dest (frame-parameter (selected-frame) 'exwm-outer-id))
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(obj (make-instance 'xcb:KeyPress)))
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(xcb:unmarshal obj data)
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(setf (slot-value obj 'event) dest)
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:SendEvent
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:propagate 0
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:destination dest
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:event-mask xcb:EventMask:NoEvent
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:event (xcb:marshal obj exwm-systemtray--connection))))
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(xcb:flush exwm-systemtray--connection))
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(defun exwm-systemtray--on-workspace-switch ()
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"Reparent/Refresh the system tray in `exwm-workspace-switch-hook'."
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(exwm--log)
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(unless (exwm-workspace--minibuffer-own-frame-p)
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(exwm-workspace--update-offsets)
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:ReparentWindow
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:window exwm-systemtray--embedder-window
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:parent (string-to-number
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(frame-parameter exwm-workspace--current
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'window-id))
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:x 0
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:y (- (elt (elt exwm-workspace--workareas
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exwm-workspace-current-index)
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3)
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exwm-workspace--frame-y-offset
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exwm-systemtray-height))))
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(exwm-systemtray--refresh))
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(defun exwm-systemtray--refresh-all ()
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"Reposition/Refresh the system tray."
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(exwm--log)
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(unless (exwm-workspace--minibuffer-own-frame-p)
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(exwm-workspace--update-offsets)
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:ConfigureWindow
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:window exwm-systemtray--embedder-window
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:value-mask xcb:ConfigWindow:Y
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:y (- (elt (elt exwm-workspace--workareas
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exwm-workspace-current-index)
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3)
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exwm-workspace--frame-y-offset
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exwm-systemtray-height))))
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(exwm-systemtray--refresh))
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(cl-defun exwm-systemtray--init ()
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"Initialize system tray module."
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(exwm--log)
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(cl-assert (not exwm-systemtray--connection))
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(cl-assert (not exwm-systemtray--list))
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(cl-assert (not exwm-systemtray--selection-owner-window))
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(cl-assert (not exwm-systemtray--embedder-window))
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(unless exwm-systemtray-height
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(setq exwm-systemtray-height (max exwm-systemtray--icon-min-size
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(line-pixel-height))))
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;; Create a new connection.
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(setq exwm-systemtray--connection (xcb:connect))
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(set-process-query-on-exit-flag (slot-value exwm-systemtray--connection
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'process)
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nil)
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;; Initialize XELB modules.
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(xcb:xembed:init exwm-systemtray--connection t)
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(xcb:systemtray:init exwm-systemtray--connection t)
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;; Acquire the manager selection _NET_SYSTEM_TRAY_S0.
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(with-slots (owner)
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(xcb:+request-unchecked+reply exwm-systemtray--connection
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(make-instance 'xcb:GetSelectionOwner
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:selection xcb:Atom:_NET_SYSTEM_TRAY_S0))
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(when (/= owner xcb:Window:None)
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(xcb:disconnect exwm-systemtray--connection)
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(setq exwm-systemtray--connection nil)
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(warn "[EXWM] Other system tray detected")
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(cl-return-from exwm-systemtray--init)))
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(let ((id (xcb:generate-id exwm-systemtray--connection)))
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(setq exwm-systemtray--selection-owner-window id)
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:CreateWindow
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:depth 0
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:wid id
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:parent exwm--root
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:x 0
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:y 0
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:width 1
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:height 1
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:border-width 0
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:class xcb:WindowClass:InputOnly
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:visual 0
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:value-mask xcb:CW:OverrideRedirect
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:override-redirect 1))
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;; Get the selection ownership.
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:SetSelectionOwner
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:owner id
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:selection xcb:Atom:_NET_SYSTEM_TRAY_S0
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:time xcb:Time:CurrentTime))
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||
;; Send a client message to announce the selection.
|
||
(xcb:+request exwm-systemtray--connection
|
||
(make-instance 'xcb:SendEvent
|
||
:propagate 0
|
||
:destination exwm--root
|
||
:event-mask xcb:EventMask:StructureNotify
|
||
:event (xcb:marshal
|
||
(make-instance 'xcb:systemtray:-ClientMessage
|
||
:window exwm--root
|
||
:time xcb:Time:CurrentTime
|
||
:selection
|
||
xcb:Atom:_NET_SYSTEM_TRAY_S0
|
||
:owner id)
|
||
exwm-systemtray--connection)))
|
||
;; Set _NET_WM_NAME.
|
||
(xcb:+request exwm-systemtray--connection
|
||
(make-instance 'xcb:ewmh:set-_NET_WM_NAME
|
||
:window id
|
||
:data "EXWM: exwm-systemtray--selection-owner-window"))
|
||
;; Set the _NET_SYSTEM_TRAY_ORIENTATION property.
|
||
(xcb:+request exwm-systemtray--connection
|
||
(make-instance 'xcb:xembed:set-_NET_SYSTEM_TRAY_ORIENTATION
|
||
:window id
|
||
:data xcb:systemtray:ORIENTATION:HORZ)))
|
||
;; Create the embedder.
|
||
(let ((id (xcb:generate-id exwm-systemtray--connection))
|
||
(background-pixel (exwm--color->pixel exwm-systemtray-background-color))
|
||
frame parent depth y)
|
||
(setq exwm-systemtray--embedder-window id)
|
||
(if (exwm-workspace--minibuffer-own-frame-p)
|
||
(setq frame exwm-workspace--minibuffer
|
||
y (if (>= (line-pixel-height) exwm-systemtray-height)
|
||
;; Bottom aligned.
|
||
(- (line-pixel-height) exwm-systemtray-height)
|
||
;; Vertically centered.
|
||
(/ (- (line-pixel-height) exwm-systemtray-height) 2)))
|
||
(exwm-workspace--update-offsets)
|
||
(setq frame exwm-workspace--current
|
||
;; Bottom aligned.
|
||
y (- (elt (elt exwm-workspace--workareas
|
||
exwm-workspace-current-index)
|
||
3)
|
||
exwm-workspace--frame-y-offset
|
||
exwm-systemtray-height)))
|
||
(setq parent (string-to-number (frame-parameter frame 'window-id))
|
||
depth (slot-value (xcb:+request-unchecked+reply
|
||
exwm-systemtray--connection
|
||
(make-instance 'xcb:GetGeometry
|
||
:drawable parent))
|
||
'depth))
|
||
(xcb:+request exwm-systemtray--connection
|
||
(make-instance 'xcb:CreateWindow
|
||
:depth depth
|
||
:wid id
|
||
:parent parent
|
||
:x 0
|
||
:y y
|
||
:width 1
|
||
:height exwm-systemtray-height
|
||
:border-width 0
|
||
:class xcb:WindowClass:InputOutput
|
||
:visual 0
|
||
:value-mask (logior xcb:CW:BackPixmap
|
||
(if background-pixel
|
||
xcb:CW:BackPixel 0)
|
||
xcb:CW:EventMask)
|
||
:background-pixmap xcb:BackPixmap:ParentRelative
|
||
:background-pixel background-pixel
|
||
:event-mask xcb:EventMask:SubstructureNotify))
|
||
;; Set _NET_WM_NAME.
|
||
(xcb:+request exwm-systemtray--connection
|
||
(make-instance 'xcb:ewmh:set-_NET_WM_NAME
|
||
:window id
|
||
:data "EXWM: exwm-systemtray--embedder-window")))
|
||
(xcb:flush exwm-systemtray--connection)
|
||
;; Attach event listeners.
|
||
(xcb:+event exwm-systemtray--connection 'xcb:DestroyNotify
|
||
#'exwm-systemtray--on-DestroyNotify)
|
||
(xcb:+event exwm-systemtray--connection 'xcb:ReparentNotify
|
||
#'exwm-systemtray--on-ReparentNotify)
|
||
(xcb:+event exwm-systemtray--connection 'xcb:ResizeRequest
|
||
#'exwm-systemtray--on-ResizeRequest)
|
||
(xcb:+event exwm-systemtray--connection 'xcb:PropertyNotify
|
||
#'exwm-systemtray--on-PropertyNotify)
|
||
(xcb:+event exwm-systemtray--connection 'xcb:ClientMessage
|
||
#'exwm-systemtray--on-ClientMessage)
|
||
(unless (exwm-workspace--minibuffer-own-frame-p)
|
||
(xcb:+event exwm-systemtray--connection 'xcb:KeyPress
|
||
#'exwm-systemtray--on-KeyPress))
|
||
;; Add hook to move/reparent the embedder.
|
||
(add-hook 'exwm-workspace-switch-hook #'exwm-systemtray--on-workspace-switch)
|
||
(add-hook 'exwm-workspace--update-workareas-hook
|
||
#'exwm-systemtray--refresh-all)
|
||
(add-hook 'menu-bar-mode-hook #'exwm-systemtray--refresh-all)
|
||
(add-hook 'tool-bar-mode-hook #'exwm-systemtray--refresh-all)
|
||
(when (boundp 'exwm-randr-refresh-hook)
|
||
(add-hook 'exwm-randr-refresh-hook #'exwm-systemtray--refresh-all))
|
||
;; The struts can be updated already.
|
||
(when exwm-workspace--workareas
|
||
(exwm-systemtray--refresh-all)))
|
||
|
||
(defun exwm-systemtray--exit ()
|
||
"Exit the systemtray module."
|
||
(exwm--log)
|
||
(when exwm-systemtray--connection
|
||
;; Hide & reparent out the embedder before disconnection to prevent
|
||
;; embedded icons from being reparented to an Emacs frame (which is the
|
||
;; parent of the embedder).
|
||
(xcb:+request exwm-systemtray--connection
|
||
(make-instance 'xcb:UnmapWindow
|
||
:window exwm-systemtray--embedder-window))
|
||
(xcb:+request exwm-systemtray--connection
|
||
(make-instance 'xcb:ReparentWindow
|
||
:window exwm-systemtray--embedder-window
|
||
:parent exwm--root
|
||
:x 0
|
||
:y 0))
|
||
(xcb:disconnect exwm-systemtray--connection)
|
||
(setq exwm-systemtray--connection nil
|
||
exwm-systemtray--list nil
|
||
exwm-systemtray--selection-owner-window nil
|
||
exwm-systemtray--embedder-window nil)
|
||
(remove-hook 'exwm-workspace-switch-hook
|
||
#'exwm-systemtray--on-workspace-switch)
|
||
(remove-hook 'exwm-workspace--update-workareas-hook
|
||
#'exwm-systemtray--refresh-all)
|
||
(remove-hook 'menu-bar-mode-hook #'exwm-systemtray--refresh-all)
|
||
(remove-hook 'tool-bar-mode-hook #'exwm-systemtray--refresh-all)
|
||
(when (boundp 'exwm-randr-refresh-hook)
|
||
(remove-hook 'exwm-randr-refresh-hook #'exwm-systemtray--refresh-all))))
|
||
|
||
(defun exwm-systemtray-enable ()
|
||
"Enable system tray support for EXWM."
|
||
(exwm--log)
|
||
(add-hook 'exwm-init-hook #'exwm-systemtray--init)
|
||
(add-hook 'exwm-exit-hook #'exwm-systemtray--exit))
|
||
|
||
|
||
|
||
(provide 'exwm-systemtray)
|
||
|
||
;;; exwm-systemtray.el ends here
|